20-20-20, well that kind of says a lot.
Here is what I would do, replant the plants in plastic containers using the fox farms ocean forest. DO NOT amend with anything. It has perlite in it already.
Secondly I would get the new plastic pot filled so the pot will just have to be filled in the remainder of the way after you put the plant into the pot. Next I would remove the plant from the existing pot and I would carefully flush the plant with low pressure water thru the garden hose. Try to remove as much of the existing soil as possible. Transplant into the new pot with a fair watering. Next fill one extra pot with
FFOF to the same level as the rest of the pots. This is going to be your security blanket for the time being. Once you have all of the plants transplanted you are done. Do not touch them or feed them. Every day check the pots for weight. Once the pots weigh the same as the pot with just soil in it, they can be WATERED. Just water, no nutrients. Continue on in this manner until the plants are at the very least 4 more weeks old and then get yourself a PPM meter. Preferable a blue labs pen. Get the combo pack with the PPM meter and the PH meter. After 4 weeks you can begin to feed the plant. Start off with a PPM of say 600 and DO NOT JACK up the nutrients. Once you get into flower you can raise the nutrients. The more you raise the nutrient level the better you have to be at understanding the issues that come with high PPMs. Meaning get a few grows under your belt before you start really feeding the plant. To quote a favorite movie, What do you have to do to win the race?
Well the first thing you have to do is finish the race.
Finish a couple of runs and learn then you can do more.